Melanonychia Striata

Melanonychia Striata = تصبغ الظفرالميلاني بشكل خطي Melanonychia   Melanonychia is due to the presence of melanin in the nail plate. It can be caused by activation or proliferation of nail matrix melanocytes. In most cases melanonychia appears as a single or longitudinal brown to black band. Multiple bands of melanonychia are usually due to […]

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Melasma = الكلف

Melasma = الكلف Melasma   Melasma is a common hypermelanosis that typically occurs on sun-exposed areas in the face. The pathogenesis is poorly understood, but genetic and hormonal influences in combination with UV radiation are important. Specific precipitants include: birth control pills, estrogen replacement therapy, mild ovarian or thyroid dysfunction, ovarian tumors, cosmetics, nutrition, phototoxic […]

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